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<?php class Test implements \JsonSerializable { protected $a; protected $b; public $c; public function __construct() { $this->a = 1; $this->b = 2; $this->c = 3; } public function jsonSerialize() { return [$this->a, $this->b]; } } $t = new Test(); echo json_encode($t->jsonSerialize()); echo json_encode($t);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Return type of Test::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/SoLW6 on line 14 [1,2][1,2]
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
[1,2][1,2]
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/SoLW6 on line 15
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/SoLW6 on line 3 Parse error: syntax error, unexpected '[' in /in/SoLW6 on line 15
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/SoLW6 on line 3 Parse error: parse error, unexpected '[' in /in/SoLW6 on line 15
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/SoLW6 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting '{' in /in/SoLW6 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/SoLW6 on line 3
Process exited with code 255.
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